14-letter words containing n, o, a, d
- window cleaner — someone that cleans windows for a living
- window display — an arrangement of items in a shop window
- windsor castle — a castle in the town of Windsor in Berkshire, residence of English monarchs since its founding by William the Conqueror
- wing commander — British. an officer in the Royal Air Force equivalent in rank to a lieutenant colonel in the U.S. Air Force.
- wood engraving — the art or process of engraving designs in relief with a burin on the end grain of wood, for printing.
- word formation — the formation of words, for example by adding prefixes or suffixes to roots
- world champion — someone who has won a competition open to people throughout the whole world
- world language — a language spoken and known in many countries, such as English
- wrongful death — the death of a person wrongfully caused, as comprising the grounds of a damage suit.
- wyandotte cave — a cave in S Indiana: one of the most extensive in the U.S., with 23 miles (37 km) of passages.
- xanthosiderite — a mineral, hydrous iron oxide, Fe 2 O 3 ⋅2H 2 O.
- xenodiagnostic — of or relating to xenodiagnosis
- yard-long bean — asparagus bean.
- yeddo hawthorn — a Japanese shrub, Raphiolepis umbellata, of the rose family, having leathery leaves and dense, hairy clusters of fragrant white flowers.
- yoda condition — (programming) The programming practise of using if (constant == variable) e.g. if (4 == foo) instead of the more natural if (variable == constant) It is named after the Star Wars character Yoda who says things like "Strong is Vader". It may have been invented as a way to prevent coding errors like if (count = 5) (accidentally using a single "=" (assignment) instead of a double "==" (comparison)). The above is syntactically valid whereas the Yoda equivalent would give a compile-time error.
- young marrieds — young married people
- zenaida (dove) — either of two wild doves, (Zenaida aurita) of Florida and the Caribbean, or (Z. asiatica) of the SW U.S. to Chile
- zeno's paradox — any of various versions of a paradox regarding the relation of the discrete to the continuous and requiring the concept of limit for its satisfactory explanation.
- zona pellucida — the transparent, noncellular layer surrounding the ovum of mammals, often having radial striations.